Siding-machine



T. LARSSON.

SIDING MACHINE.

APPLICATION HLED DEC.20,'19I8.

3 SHEETSSHEET I.

lNVENTOR Tlzzu'elamsalz Patented Dec. 7, 1920.

5 w ..Y m -il II I 1 II a 5 4;

T. LARSSON.

SIDING MACHINE.

APPLICATION FILED DEC-20. 1918.

1,361,794. v Patented Dec. 7, 1920."

3 SHEETS-SHEET 2.

INVENTOR Tlzurelarssam T. LAHSSON.

SIDING MACHINE.

APPLICATION FILED 0:0,20. I9I8.

3 SHEETS-SHEET 3.

INVENT OR ff a'elmson/ VA ORNE Y Patented Dec. 7, 1920.

UNITED STATES PATENT OFFICE.

THURE LARSSON, OF WORCESTER, MASSACHUSETTS, ASSIG-NOR TO NORTON COMPANY, OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS SIDING-MACHINE.

' Specification of Letters Patent.

Patented Dec. '7, 1920.

Application filed December 20, 1918. Serial No. 267,703.

To all whom it may concern:

Be it known that I, THURE LARSSON, a citizen of the United States of America, residing at \Vorcester, in the county of forcester and State of Massachusetts, have invented certain new and useful Improvements in Siding-Machines, of which the following is a full, clear, and exact specification.

My invention relates to a duplex siding machine, of the type described in the patent to Higgins and Alden #566908 of September 1, 1896, and more particularly to the work holder and means for lubricating the movable parts.

In order to true up the sides of a grinding wheel, it is necessary to grip the periphery of the wheel and rotate it relative to a cutting tool which is passed transversely across the face of the rotating body. The construction illustrated in said patent involves an annular ring carrying work holding aws, which rotates in peculiarly shaped bearings. Heretofore, it has been difficult to provide sufficient lubrication for this ring because of the weight of the work, the extent and nature of the bearing surface and the presence of dust. Furthermore, the work holding device has not been'of a type which would permit quick insertion and removal of the heavy grinding wheel and at the same time main tain the rotating body in correct position for the siding operation.

It is accordingly an object of my invention to provide the work carrying ring of a siding machine with proper bearing supports and a lubrication system which will be satisfactory at all times, not only for lubricating the rotating parts but also to lubricate the movable members of the work supporting devices.

A further object is to provide a work'holding device and its associated parts which will effectively hold a grinding wheel in place and permit quick change ofthe work.

With these and other objects in .view as will be apparent from the following disclosure, my invention resides in the combination of parts set forth in the specification and described in the claims appended hereto.

In the drawings in which like reference numerals indicate like parts:

Figure 1 is a vertical section of a part of a truing device;

Fig, 2 is an elevation partly in section of the device illustrated in Fig. 1;

Fig. 3 is an elevation partly in section of the rotating ring and a portion of the bearing block removed from the machine, which illustrates a modified type of lubricating system; and

Fig. 4 is a section on the line 4-4 of Fig. 3.

In the embodiment of the invention herein described, I have shown annular channel bearings which may be U- or V-shaped, having a ring rotatably mounted therein adapted to support the work being treated. This ring has a substantially annularly shaped oil passage provided with means to feed oil to the bearings. Inthe preferred modificatiomthis device also includes chuck members which arefixed to the ring and are lubricated by the same lubricating system.

With reference tothe device illustrated in Figs. 1 and 2, I have there shown a casing 1 adapted to be mounted on a suitable support. This casing has an annular, inwardly facing U-shaped groove 2 therein withinwhich rotates the ring 3. A grinding Wheel 4, which is to have its sides trued by means of a suitably'mounted cutting tool 5, is mounted on the ring as described below. The casing 1 has a cover 6 fitted thereover to keep out dust and foreign bodies, this part not being illustrated in Fig. 1 for the sake of clarity of illustration.

The casing 1 comprises two annular parts 7 and 8 carrying peripheral and side bearing shoes 9 and 10 respectively suitably mounted therein.- The peripheral shoes 9, which have Babbitt linings 11, are preferably shaped like segments of a circle. These are adjustable inwardly to take up wear, by means of cap screws 12 passing through the casing and held in place by locking nuts 13 thereon. Further cap screws 14 are set into the shoes in order that the latter may be held firmly in place in a desired location. The side bearing members 10 are formed of preferably continuous rings of Babbitt metal fixed in the parts 7 and 8;

The ring or rotor 3, which is adapted to carry the grinding wheel, has peripheraland side faces adapted to bear against these bearing shoes during rotation. Fixedly held on opposite sides of this ring 3 by means of cap screws 15 are two pulley rings 16 and 17, which have grooves therein provided with rubber inserts 18 for gripping a driving rope-19.

In order to hold the grinding wheel 4 in proper position,.I provide a special mechanism comprising three jaw members 21 each of which is fixed to a support 22 as by means of cap screws 23, whereby the part 21 may be removed and replaced by jaws of different dimensions to correspond with the different wheel sizes.

25 therein adapted to receive the posts 26 which project downwardly from the jaw member 22, whereby the latter is prevented from turning, these posts sliding in the bearing'sockets as the jaw is adjusted inwardly and outwardly. Pinned in a socket in part 22 is a screw 27 having threads thereon.

which engage with the threaded portion of a nut 28. This nut passes centrally through the block 24 and is rotatably mounted in a socket 29 in the ring 3. A circumferential groove 31 in the nut engages a pin in the ring 3 and thereby permits the nut to turn freely but prevents it'b eing moved longitudinally sponding nuts in the other members similarly rotated by means of motion transmitted through pinion 3 1 and the ring 35, which is freely slidable within its mountings. 7

Owing to the extended bearing surface'of this ring 3, which may be several feet in diameter, it is difficult to provide satisfactory lubrication therefor by the ordinary methods. After considerable experimenta tion, I have found that this ring may be satisfactorily lubricated by utilizing centrifugal force to distribute the oil to the bearing surfaces. This may be accomplished by pro viding an annular oil passage within the ring which has an outer peripheral surface against which the oil may be thrown by the centrifugal action of the rotating ring, and from that surface conducted to the bearing. In the embodiment illustrated in Figs. 1 and 2, two annular oil passages 10 are provided, these being formed as grooves in the side of the ring 3. Each groove has an undercut portion 41 extending outwardly toward the periphery of the ring and adapted to catch 7 the oil thrown out centrifugally by the rotative action. An inwardly projecting flange 42 on the casing 1 forms'the outer Wall of each annular passage. The space 43 between the stationary bearing casing 1 and the rotating member 3, which is made staggered as illustrated to prevent the admission of dust, connects at its inner end with'theoil'passage 40 through an enlarged The block 24 mounted between the pulley rings 16 and 17 has two sockets portion 1- 1 formed as an annular groove in the wallof the casing 1. The flange 45 proj ecting outwardly from therotating member 16 serves to throw any oil that tends to creep around the flange against the wall. of passage 14. This oil is returned through the groove 14 to the lower portion of the easing where it drains back through a hole d6 into the oil passage 10. In order to lubricate the outer bearing shoes 9, a series of holes 47 are provided to lead oil to the outer face of the ring. Further grooves 48connect the oil passages with the sides of the ring 3 adjacent to the bearing blocks 10.

In order to supply oil to this circumferential groove or oilpassage LG I provide grooves 19 at the lowermost point inthe bearing blocks 10. lileans to supply oil at a constant level to this passage through the grooves 49 may comprise a tank 50 having a continuous supply of oil thereto and adapted to overflow into another tank. This tank 50 is connected with the casing by means of a pipe 51, a hole 52 connecting with grooves e9 being made through the bearing blocks for this purpose. The level of the oil is maintained at such a height that the circumferential groove at the bottom of the ring is partly filled with oil. Therefore, when the ring and grinding wheel are rotated the oil is carried centrifugally around the outer periphery of this groove and transmitted through the various ducts or to the bearing blocks.

The chuck bearing surfaces may besufficicntly lubricated by means of further passages 53 which conduct oil from the innerside of passage 10 to a position adjacent the ring 35. Cross passages 54 connect the two annular oil passages, each in turn being con nected. by a hole 55 with the socket 2 whereby oil may be transmitted to the lower end of the nut 28. Suitable packing 56 and 57 is used to prevent escape of the oil from the chuck parts.

As a modification of this oiling system, I may provide a simpler construction shown Figs. 3 and 4. In this form, instead of providing a source of oil to provide a constant How to the annular oil passage, I inelose this oil passage within the ring and fill it with oil to a suitable extent, The ring 3 is here provided with a substantially annular -oil groove 60 in its outer periphery which is closed by a band 61 shrunk onto the ring and preferably provided with dowel. pins 62 to hold it more securely in place, thereby forming a closed passage having a peripheral annular surface adapted to retain oil under centrifugal action. Two partitions 63 and 64 may be provided to breay this annular channel into separate portions. Feed openings 65 adapted to be closed by screwthreaded plugs 66 maybe provided to sup ply oil to the peripheral'surface. In order that oil may be thrown outwardly against the bearing surfaces from the annular oil passage, I provide suitable channels to the bearing blocks through the outer ring 61. These channels 67 are preferably closed by means of porous plugs of wood 68 which permit oil to creep through gradually. An annular groove 69 in casing 1 is provided at each side of the rotating ring 3 for retaining any oil which creeps outwardly in the proximity of the bearings. In this modification, the members have been omitted for the sake of simplicity of illustration. It is clear that the construction above describes may be adopted or one may bolt on removable jaws to the projecting ring 70 illustrated in Fig. 4 as provided with holes 71 for this purpose.

In operation, the two modifications are substantially alike, except as regards the supply of oil. In the type shown in Fig. 3, the oil is carried in the oil channel 60 and thrown centrifugally against the outer plate 61 and from there works its way through the wooden plug 68, to the peripheral and side bearings. In order to insert a wheel in the device illustrated. in Figs. 1 and 2, one of the nuts 28 is turned by means of a spanner wrench to open the chuck jaws. The wheel. is then inserted and the jaws closed, after which the ring may be normally rotated. Due to centrifugal action, oil works its way along the outer walls of the annular passages and finds its way to the bearings. Sufficient oil creeps to the movable jaw members especially whenthe device is at rest to keep them lubricated.

I claim 1. In a siding machine, a casing provided with an annular bearing, a ring rotatably mounted in said bearing and carrying inwardly projecting jaw members to support the work being treated, said ring having an annular peripheral surface adapted to retain oil under centrifugal action and communicating passages from said surface to the outside of the ring adjacent to the hearing to feed oil thereto.

2. In a siding machine, a casing having an annular channel bearing therein, a ring rotatably mounted in said bearing, radially projecting jaw members on said ring adapted to hold a wheel to'be sided, said ring having an annular peripheral surface adapted to retain oil under centrifugal action and communicating passages therefrom to the outer surface of the ring to feed oil to the bearing, and means to supply oil to said peripheral surface.

3. In a siding machine, a casing having an annular channel bearing therein, a ring rotatably mounted in said bearing, radially projecting aw members on said ring adapted to hold a wheel to be sided, said ring having an annular peripheral surface adapted to retain oil under centrifugal action and communicating passages therefrom to the outer surface of the ring to feed oil to the bearing, and means to maintain a constant level of oil to submerge the oil retaining surface.

4. In a siding machine, a casing having an annular channel bearing therein, a ring rotatably mounted insaid bearing, radially projecting jaw member. on said ring adapted to hold a wheel to be sided, said ring having an annular peripheral surface adapted to retain oil under centrifugal action and communicating passages therefrom to the outer surface of the ring to feed oil to the bearing, and means to prevent lateral escape of the oil from the ring while rotating.

5. In a siding machine, a casing provided with a bearing, a ring rotatably mounted in this bearing, spaced jaws on the ring for supporting work to be treated, rotatable but longitudinally immovable nuts mounted on the ring, radially disposed screw-threaded members aflixed to said jaws and threaded into said nuts and means for rotating the nuts to adjust the radial position of the screws and jaws carried thereby.

6. In a siding machine, a casing having an annular bearing, a ring rotatably mounted therein, rotatable but longitudinally immovable nuts mounted in spaced relation on said ring, radially projecting screw-threaded members mounted in said nuts, jaws affixed to the inner ends of said screws, means --to prevent rotation of said j aws, means permitting turning one nut and means for transmitting the motlon to all of the aws to move them radially.

7. In a siding machine, a casing provided a with an annular U-shaped bearing, a ring rotatably mounted in this hearing, spaced jaws on the inside of the ring for supporting work to be treated, rotatable but longitudinally immovable nuts mounted on the ring, screw-threaded members aflixed to said jaws and threaded into said nuts and means for rotating the nuts to adjust the radial position of the screws and jaws carried thereby, said ring having an annular oil passage therein and transverse passages connecting said annular oil passage with the outer surface of the ring and said nuts for transmitting oil to the bearing and jaw adj usting parts.

8. In a siding machine, a casing having an annular bearing, a ring mounted to rotate in said bearing, work holding jaws mounted on the inside of said ring, means for adjusting the jaws radially, said ring having an annular groove in a side thereof provided with a recessed portion adapted to present a peripheral surface capable of holding oil thrown against it centrifugally, said ring also having passages connecting said groove with the outer surface of the ring to lubricate the bearing, and means for supplying oil to said groove.

9. In a siding machine, a casing having U-shaped hearings, a ring rotatably mounted therein, rotatable but longitudinally immovable nuts mounted in spaced relation on said ring, radially projecting screw-threaded members mounted in said nuts, jaws aflixed to the inner ends of said screws, means to prevent rotation of said jaws and means for turning the nuts simultaneously and thereby moving all of the jaws, said ring having an annular peripheral surface adapted to retain oil during rotation of the ring and transverse passages from said surface to the outer and inner ring surfaces to lubricate the bearings and the movable jaw parts and means to maintain a supply of oil in contact with a portion of said annular surface.

Signed at lVorcester, Massachusetts, this 17th day of Dec., 1918.

THUR-E LARSSON. 

